<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>盒子</title>
	<style>
		.box{
			width: 200px;
			height: 200px;
			background: red url() 0 0 no-repeat;
			border-top: 10px solid blue;
			border-bottom: 10px solid blue;
			margin-bottom: 10px;/*外边距*/
			/*padding-left: 80px;/*内边距*/
			overflow: auto;
			/*overflow: hidden;*/
		}
		.son{
			width: 100px;
			height: 100px;
			background: blue url() 0 0 no-repeat;
			/* margin-left: 80px; */
		}
	</style>
</head>
<body>
	<div class="box">
		<div class="son">
			
		</div>
	</div>
	<div class="box">
		学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思学并思
	</div>
</body>
</html>